Self-gravity spine protection chair with adjustable backrest height

Abstract

The invention discloses a backrest height-adjustable self-gravity spine protection chair, and relates to the technical field of chairs, the backrest height-adjustable self-gravity spine protection chair comprises a protection chair backrest, the front surface of the protection chair backrest is provided with an air bag back cushion, the bottom of the front surface of the protection chair backrest is movably provided with a waist support, and the top of the front surface of the protection chair backrest is provided with a neck pillow; the overall structure of the protective chair is locked through a locking assembly, the protective chair can be used as a common chair, after an abutting column is horizontally overturned around a connecting column, the abutting column is separated from the surface of a connecting frame, at the moment, a rotating end can be rotated, a moving plate and a transverse column horizontally move, and therefore a clamping rod is driven to be separated from a clamping hole, and the protective chair can be used as an ordinary chair. When the spine protection chair is unlocked, the protection chair linkage structure is unlocked, linkage adjustment of the spine protection chair is achieved, a backrest and a cushion of the protection chair can be rapidly adjusted, the adjusting process is simplified, stress of the whole spine is reduced by fixing the waist, the chest and the armpits of the human body, the spine protection function is achieved, and therefore the practicability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chairs, and more particularly to a self-gravity spine protection chair with an adjustable backrest height. Background Art

[0002] A spine protection chair is a chair designed specifically to improve and protect spinal health. It usually combines ergonomic principles and provides a variety of functions and features to reduce the adverse effects of long-term sitting on the spine.

[0003] When using a traditional spinal protective chair, it is often necessary to adjust the position of the backrest, seat cushion and other parts according to the user's own specifications. However, due to the structural limitations of the protective chair itself, the backrest and seat cushion cannot be linked, so they need to be adjusted in turn. The whole process is rather cumbersome, which makes the protective chair inconvenient to adjust and use, reducing the practicality of the spinal protective chair to a certain extent. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a self-gravity spine protection chair with adjustable backrest height. Relying on the downward gravity of the passenger's own weight when sitting down, the fixing device that connects and fixes the lumbar vertebrae, spine, thoracic vertebrae, and armpits is pulled up in the reverse direction to realize the linkage adjustment of the spine protection chair, so that the backrest and seat cushion of the protection chair can be adjusted quickly, simplifying the adjustment process, and by fixing the human body's waist, chest, and armpits, the force on the entire spine is reduced, thereby realizing the function of protecting the spine, thereby solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a self-gravity spine protection chair with adjustable backrest height, comprising

[0006] A protective chair backrest, wherein an airbag cushion is arranged on the front of the protective chair backrest, a lumbar support is movably installed on the bottom of the front of the protective chair backrest, and a neck pillow is arranged on the top of the front of the protective chair backrest;

[0007] A waist fixing mechanism, which is detachably mounted on the side of the protective chair backrest, and a movable armrest is arranged on the surface of the waist fixing mechanism, and the movable armrest is arranged as a vertical telescopic structure;

[0008] A seat cushion, wherein a connecting plate 1 is arranged on the back side of the seat cushion, and a clamping hole is provided on a side of the connecting plate 1 opposite to the seat cushion;

[0009] A mounting frame, a fixing seat is fixedly installed on the top of the mounting frame, a surface of the fixing seat is fitted with the back of the protective chair backrest, a connecting frame is fixedly installed on the side of the fixing seat surface opposite to the protective chair backrest, a mounting shaft is rotatably installed on the top of the connecting frame, a silent fixed pulley is arranged at one end of the mounting shaft, a steel rope is arranged on the surface of the silent fixed pulley, one end of the steel rope is fixedly connected to the top surface of the connecting plate 1, the other end of the steel rope is fixedly connected to the connecting seat, a spring is fixedly connected to the bottom of the connecting seat, and one end of the spring opposite to the connecting seat is fixedly connected to the top of the fixing seat;

[0010] The limiting plates are relatively arranged on two sides of the fixing seat in the width direction, and the bottom surface of the limiting plates is in contact with the top surface of the connecting plate 1.

[0011] In a preferred embodiment, it further comprises a locking assembly, which is arranged on a side of the connecting frame surface opposite to the fixing seat.

[0012] In a preferred embodiment, the locking assembly includes a mounting end, a screw rod 1, a rotating end, a connecting plate 2, a connecting column, a torsion spring, a fixed plate, an abutting column, a movable plate, a cross column, and a clamping rod, wherein the mounting end is rotatably mounted on the inner wall of the connecting frame, one end of the screw rod 1 is fixedly connected to the surface of the mounting end, the screw rod 1 is arranged at an end of the screw rod 1 opposite to the mounting end, the connecting plate 2 is fixedly mounted on the periphery of the rotating end, the connecting column is rotatably mounted on the surface of the connecting plate 2, the torsion spring is fixedly connected between the connecting plate 2 and the connecting column, the abutting column is fixedly connected to the surface of the connecting column through the fixed plate, the surface of the abutting column contacts the surface of the connecting frame, the movable plate is threadedly mounted on the surface of the screw rod 1, the side surface of the movable plate is slidably connected to the inner wall of the connecting frame, the cross column is arranged at the bottom of the movable plate, the clamping rod is relatively arranged on both sides of the surface of the cross column, and one end of the clamping rod is clamped with the inside of the clamping hole.

[0013] In a preferred embodiment, it also includes an auxiliary lifting component, which is arranged on the top of the connecting seat.

[0014] In a preferred embodiment, the auxiliary lifting assembly includes a mounting seat, gear one, screw two, a lifting column, gear two, and a rotating handle. The mounting seat is fixedly mounted on the top surface of the connecting seat, the gear one is rotatably mounted on the inner wall at the top of the mounting seat, the bottom end of the screw two is fixedly connected to the inner ring of gear one, the lifting column is threadedly mounted on the surface of screw two, the surface of the lifting column is fixedly connected to the back of the protective chair backrest, the gear two is rotatably mounted on the inside of the mounting seat on the side opposite to the back of the protective chair backrest, the rotating handle is fixedly mounted on the inner ring of gear two, the outer edge of the gear two is meshed with the outer edge of the gear one, a damping bracket is movably mounted on the top of the lifting column, the top of the damping bracket is fixedly connected to a headrest, and the surface of the headrest is provided with a telescopic cervical vertebrae fixing support.

[0015] In a preferred embodiment, the protective chair further comprises a support assembly, wherein the support assembly is arranged at the bottom of the protective chair backrest.

[0016] In a preferred embodiment, the support assembly includes a wheeled chassis, a telescopic bracket, a connecting platform, a motor, a rotating column, a support plate, an electric push rod, and an abutment seat. The telescopic bracket is fixedly mounted on the top of the wheeled chassis, the top of the telescopic bracket is fixedly connected to the center of the bottom surface of the connecting platform, the motor is fixedly mounted on one side of the top surface of the connecting platform, the rotating column is rotatably mounted on the top surface of the connecting platform, one end of the rotating column is fixedly connected to the driving shaft of the motor, the support plate is fixedly connected to the surface of the rotating column, the surface of the support plate is slidably connected to the inner wall of the protective chair backrest, the side surface of the support plate is slidably connected to the surface of the connecting plate, the back side of the support plate is fixedly connected to the surface of the mounting frame, the electric push rod is fixedly mounted on the bottom of the connecting platform, and the abutment seat is movably mounted on the top of the connecting platform, the bottom surface of the abutment seat is fixedly connected to the top of the electric push rod, and the surface of the abutment seat abuts against the bottom of the support plate.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention locks the overall structure of the protective chair by means of a locking assembly, so that the protective chair can be used as an ordinary chair. After the abutment column is horizontally flipped around the connecting column, the abutment column is separated from the surface of the connecting frame. At this time, the rotating end can be rotated to make the movable plate and the horizontal column move horizontally, thereby driving the clamping rod to separate from the clamping hole, and the protective chair linkage structure is unlocked. At this time, the seat cushion slides downward under the body weight of the user, and the steel rope is pulled downward to pull the connecting seat through the silent fixed pulley, so that the backrest of the protective chair drives the airbag cushion, lumbar support, neck pillow, lumbar fixing mechanism, and movable armrest to slide upward synchronously. The user's waist is fixed by the waist fixing mechanism and supported by the movable armrests. When the user leaves the chair, the seat cushion can be moved up and reset under the gravity of the protective chair back and the elasticity of the spring and is limited by the limit plate. Thereafter, the protective chair as a whole can be locked again by the locking assembly, thereby realizing the linkage adjustment of the spinal protective chair, so that the protective chair back and seat cushion can be adjusted quickly, simplifying the adjustment process, and reducing the force on the entire spine by fixing the human waist, chest and armpits, realizing the function of protecting the spine, thereby improving the practicability of the device.

[0019] 2. The present invention rotates the rotating handle to rotate gear 2, and gear 1 meshing therewith can also rotate at the same time, thereby driving the rotating handle to rotate synchronously. Under the limiting effect of the support plate on the protective chair backrest, the lifting column together with the protective chair backrest can be further moved upward to adjust the height position of the protective chair backrest again, so that the user can further adjust the height position of the protective chair backrest to meet their own practical needs, thereby further improving the practicality of the device.

[0020] 3. The present invention drives the abutment seat downward by contracting the electric push rod, so that the top of the abutment seat is separated from the bottom of the support plate. At this time, the support plate is in an active state. Thereafter, the motor drives the rotating column to rotate, thereby adjusting the angle of the backrest and the seat cushion of the protective chair. After rotating to a certain angle, the electric push rod is extended to drive the abutment seat upward, so that the inclined surface of the top of the abutment seat can abut against the bottom of the support plate after the flipping, that is, the support plate is fixed, so that the backrest and the seat cushion of the protective chair can be maintained at the current angle, thereby realizing the angle adjustment of the protective chair and ensuring its stability after the angle adjustment, thereby meeting the diverse needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the front structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the back structure of the present invention.

[0023] Figure 3 It is a three-dimensional assembly schematic diagram of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the locking assembly of the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the auxiliary lifting component of the present invention.

[0026] Figure 6 It is a schematic diagram of the support assembly structure of the present invention.

[0027] The accompanying drawings are marked as follows: 1. protective chair back; 2. airbag cushion; 3. lumbar support; 4. neck pillow; 5. lumbar fixing mechanism; 6. movable armrest; 7. seat cushion; 8. connecting plate 1; 9. snap-in hole; 10. mounting frame; 11. fixing seat; 12. connecting frame; 13. mounting shaft; 14. silent fixed pulley; 15. steel rope; 16. connecting seat; 17. spring; 18. limit plate; 19. locking assembly; 191. mounting end; 192. screw 1; 193. rotating end; 194. connecting plate 2; 195. connecting column; 196. torsion spring; 197. fixing Plate; 198, abutment column; 199, moving plate; 1910, horizontal column; 1911, clamping rod; 20, auxiliary lifting assembly; 201, mounting seat; 202, gear one; 203, screw two; 204, lifting column; 205, gear two; 206, turning handle; 21, damping bracket; 22, headrest; 23, telescopic cervical vertebrae fixing support; 24, support assembly; 241, wheeled chassis; 242, telescopic bracket; 243, connecting platform; 244, motor; 245, rotating column; 246, support plate; 247, electric push rod; 248, abutment seat. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] As attached Figure 1-6 A self-gravity spine protection chair with adjustable backrest height, comprising

[0030] A protective chair backrest 1, an airbag cushion 2 is arranged on the front of the protective chair backrest 1, a lumbar support 3 is movably installed at the bottom of the front of the protective chair backrest 1, and a neck pillow 4 is arranged on the top of the front of the protective chair backrest 1;

[0031] A waist fixing mechanism 5, which is detachably mounted on the side of the protective chair backrest 1, and a movable armrest 6 is arranged on the surface of the waist fixing mechanism 5, and the movable armrest 6 is arranged as a vertical telescopic structure;

[0032] A seat cushion 7, a connecting plate 8 is disposed on the back of the seat cushion 7, and a clamping hole 9 is provided on one side of the connecting plate 8 opposite to the seat cushion 7;

[0033] A mounting frame 10, a fixing seat 11 is fixedly installed on the top of the mounting frame 10, the surface of the fixing seat 11 fits with the back of the protective chair backrest 1, a connecting frame 12 is fixedly installed on the side of the fixing seat 11 surface opposite to the protective chair backrest 1, a mounting shaft 13 is rotatably installed on the top of the connecting frame 12, a silent fixed pulley 14 is arranged at one end of the mounting shaft 13, a steel rope 15 is arranged on the surface of the silent fixed pulley 14, one end of the steel rope 15 is fixedly connected to the top surface of the connecting plate 8, the other end of the steel rope 15 is fixedly connected to a connecting seat 16, a spring 17 is fixedly connected to the bottom of the connecting seat 16, and one end of the spring 17 opposite to the connecting seat 16 is fixedly connected to the top of the fixing seat 11;

[0034] The limiting plates 18 are relatively arranged on both sides of the fixed seat 11 in the width direction, and the bottom surface of the limiting plates 18 is in contact with the top surface of the connecting plate 8. The limiting plates 18 are set to limit the initial positions of the protective chair backrest 1 and the seat cushion 7 to prevent the seat cushion 7 from moving excessively and affecting the normal use of the protective chair.

[0035] In a preferred embodiment, a locking assembly 19 is further included. The locking assembly 19 is disposed on a side of the surface of the connecting frame 12 opposite to the fixing seat 11 .

[0036] In a preferred embodiment, the locking assembly 19 includes a mounting end 191, a screw rod 192, a rotating end 193, a connecting plate 194, a connecting column 195, a torsion spring 196, a fixed plate 197, an abutting column 198, a movable plate 199, a cross column 1910, and a clamping rod 1911. The mounting end 191 is rotatably mounted on the inner wall of the connecting frame 12, one end of the screw rod 192 is fixedly connected to the surface of the mounting end 191, the screw rod 192 is arranged at one end of the screw rod 192 opposite to the mounting end 191, the connecting plate 194 is fixedly mounted on the periphery of the rotating end 193, the connecting column 195 is rotatably mounted on the surface of the connecting plate 194, and the torsion spring 196 is fixedly connected between the connecting plate 194 and the connecting column 195. The abutment column 198 is fixedly connected to the surface of the connecting column 195 through the fixing plate 197, the surface of the abutment column 198 contacts the surface of the connecting frame 12, the movable plate 199 is threadedly installed on the surface of the screw rod 192, the side of the movable plate 199 is slidably connected to the inner wall of the connecting frame 12, the cross column 1910 is arranged at the bottom of the movable plate 199, and the clamping rod 1911 is relatively arranged on both sides of the surface of the cross column 1910, one end of the clamping rod 1911 is clamped with the inside of the clamping hole 9, and the seat cushion 7 can be fixed by the clamping rod 1911, which is clamped with the clamping hole 9, so that the overall linkage structure of the protective chair is locked, so that the overall height of the protective chair can be adjusted through the telescopic bracket 242.

[0037] In a preferred embodiment, an auxiliary lifting component 20 is further included, and the auxiliary lifting component 20 is disposed on the top of the connecting seat 16 .

[0038] In a preferred embodiment, the auxiliary lifting component 20 includes a mounting seat 201, a gear 1 202, a screw 203, a lifting column 204, a gear 205, and a rotating handle 206. The mounting seat 201 is fixedly installed on the top surface of the connecting seat 16, the gear 1 202 is rotatably installed on the inner wall at the top of the mounting seat 201, the bottom end of the screw 203 is fixedly connected to the inner ring of the gear 1 202, the lifting column 204 is threadedly installed on the surface of the screw 203, the surface of the lifting column 204 is fixedly connected to the back of the protective chair backrest 1, the gear 205 is rotatably installed on the inside of the mounting seat 201 on the side opposite to the back of the protective chair backrest 1, the rotating handle 206 is fixedly installed on the inner ring of the gear 205, the outer edge of the gear 205 is meshed with the outer edge of the gear 1 202, and a damping bracket 21 is movably installed on the top of the lifting column 204, the top of the damping bracket 21 is fixedly connected to a headrest 22, and the surface of the headrest 22 is provided with a telescopic cervical vertebrae fixing support 23.

[0039] In a preferred embodiment, a support assembly 24 is further included, and the support assembly 24 is disposed at the bottom of the protective chair back 1 .

[0040] In a preferred embodiment, the support assembly 24 includes a wheeled chassis 241, a telescopic bracket 242, a connecting platform 243, a motor 244, a rotating column 245, a support plate 246, an electric push rod 247, and an abutment seat 248. The telescopic bracket 242 is fixedly mounted on the top of the wheeled chassis 241, the top of the telescopic bracket 242 is fixedly connected to the center of the bottom surface of the connecting platform 243, the motor 244 is fixedly mounted on one side of the top surface of the connecting platform 243, the rotating column 245 is rotatably mounted on the top surface of the connecting platform 243, and one end of the rotating column 245 is connected to the driving end of the motor 244. The moving shaft is fixedly connected, the support plate 246 is fixedly connected to the surface of the rotating column 245, the surface of the support plate 246 is slidably connected to the inner wall of the protective chair back 1, the side of the support plate 246 is slidably connected to the surface of the connecting plate 8, the back of the support plate 246 is fixedly connected to the surface of the mounting frame 10, the electric push rod 247 is fixedly installed at the bottom of the connecting platform 243, the abutment seat 248 is movably installed at the top of the connecting platform 243, the bottom surface of the abutment seat 248 is fixedly connected to the top of the electric push rod 247, and the surface of the abutment seat 248 abuts against the bottom of the support plate 246.

[0041] Working principle of the present invention: By locking the overall structure of the protective chair by the locking assembly 19, the protective chair can be used as an ordinary chair, and after the abutment column 198 is horizontally flipped around the connecting column 195, the abutment column 198 is separated from the surface of the connecting frame 12, and the rotating end 193 can be rotated at this time, so that the movable plate 199 and the horizontal column 1910 move horizontally, thereby driving the clamping rod 1911 to separate from the clamping hole 9, and the protective chair linkage structure is unlocked. At this time, the seat cushion 7 slides downward under the body weight of the user, and the steel rope 15 is pulled downward through the silent fixed pulley 1 Pull the connecting seat 16, so that the protective chair backrest 1 drives the airbag cushion 2, the lumbar support 3, the neck pillow 4, the lumbar fixing mechanism 5, and the movable armrest 6 to slide upward synchronously. The user's waist is fixed by the lumbar fixing mechanism 5 and lifted by the movable armrest 6, which reduces the force on the entire spine and realizes the function of protecting the spine. When the user leaves the chair, under the gravity of the protective chair backrest 1 and the elasticity of the spring 17, the cushion 7 can move up and reset, and is limited by the limit plate 18, and then the protective chair can be locked again by the locking assembly 19;

[0042] After the protective chair back 1 is moved upward by the transmission effect of the steel rope 15, if the user is not satisfied with the current height of the protective chair back 1, the user can rotate the rotating handle 206 to rotate the gear 2 205, and the gear 1 202 meshing therewith can also rotate, thereby driving the rotating handle 206 to rotate synchronously, so that under the limiting effect of the support plate 246 on the protective chair back 1, the lifting column 204 together with the protective chair back 1 can be further moved upward to adjust the height position of the protective chair back 1 again;

[0043] When the protective chair is locked by the locking assembly 19 and the overall structure is in a fixed state, the overall height of the seat can be adjusted by the telescopic bracket 242. In addition, the abutment seat 248 can be driven downward by the contraction of the electric push rod 247, so that the top of the abutment seat 248 is separated from the bottom of the support plate 246. At this time, the support plate 246 is in a movable state, and then the motor 244 drives the rotating column 245 to rotate, so as to adjust the angle of the protective chair back 1 and the seat cushion 7. After rotating to a certain angle, the electric push rod 247 is extended to drive the abutment seat 248 to move upward, so that the inclined surface of the top of the abutment seat 248 can abut against the bottom of the flipped support plate 246, that is, the support plate 246 is fixed, so that the protective chair back 1 and the seat cushion 7 can be maintained at the current angle.

[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0045] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0046] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-weighted spine protection chair with adjustable backrest height, characterized in that: include A protective chair backrest (1), wherein an airbag cushion (2) is arranged on the front of the protective chair backrest (1), a lumbar support (3) is movably mounted on the bottom of the front of the protective chair backrest (1), and a neck pillow (4) is arranged on the top of the front of the protective chair backrest (1); A waist fixing mechanism (5), wherein the waist fixing mechanism (5) is detachably mounted on the side of the protective chair backrest (1), and a movable armrest (6) is arranged on the surface of the waist fixing mechanism (5), and the movable armrest (6) is arranged as a vertical telescopic structure; A seat cushion (7), wherein a connecting plate (8) is disposed on the back side of the seat cushion (7) and a clamping hole (9) is provided on a side of the connecting plate (8) opposite to the seat cushion (7); A mounting frame (10), wherein a fixing seat (11) is fixedly installed on the top of the mounting frame (10), the surface of the fixing seat (11) is in contact with the back of the protective chair backrest (1), a connecting frame (12) is fixedly installed on the side of the surface of the fixing seat (11) opposite to the protective chair backrest (1), a mounting shaft (13) is rotatably installed on the top of the connecting frame (12), one end of the mounting shaft (13) is provided with a silent fixed pulley (14), the surface of the silent fixed pulley (14) is provided with a steel rope (15), one end of the steel rope (15) is fixedly connected to the top surface of the connecting plate (8), the other end of the steel rope (15) is fixedly connected to a connecting seat (16), the bottom of the connecting seat (16) is fixedly connected with a spring (17), and one end of the spring (17) opposite to the connecting seat (16) is fixedly connected to the top of the fixing seat (11); A limit plate (18), wherein the limit plate (18) is relatively arranged on two sides of the fixing seat (11) in the width direction, and the bottom surface of the limit plate (18) is in contact with the top surface of the connecting plate 1 (8).

2. The self-gravity spine protection chair with adjustable backrest height according to claim 1, characterized in that: It also includes a locking assembly (19), which is arranged on a side of the surface of the connecting frame (12) opposite to the fixing seat (11).

3. The self-gravity spine protection chair with adjustable backrest height according to claim 2, characterized in that: The locking assembly (19) comprises a mounting end (191), a screw rod (192), a rotating end (193), a connecting plate (194), a connecting column (195), a torsion spring (196), a fixed plate (197), an abutting column (198), a movable plate (199), a cross column (1910), and a clamping rod (1911); the mounting end (191) is rotatably mounted on the inner wall of the connecting frame (12); one end of the screw rod (192) is fixedly connected to the surface of the mounting end (191); the screw rod (192) is arranged at one end of the screw rod (192) opposite to the mounting end (191); the connecting plate (194) is fixedly mounted on the periphery of the rotating end (193); and the connecting column (195) is rotatably mounted on the connecting plate The torsion spring (196) is fixedly connected between the connecting plate (194) and the connecting column (195); the abutting column (198) is fixedly connected to the surface of the connecting column (195) through the fixing plate (197); the surface of the abutting column (198) contacts the surface of the connecting frame (12); the movable plate (199) is threadedly mounted on the surface of the screw rod (192); the side surface of the movable plate (199) is slidably connected to the inner wall of the connecting frame (12); the cross column (1910) is arranged at the bottom of the movable plate (199); the clamping rod (1911) is relatively arranged on both sides of the surface of the cross column (1910); one end of the clamping rod (1911) is clamped to the inside of the clamping hole (9).

4. The self-gravity spine protection chair with adjustable backrest height according to claim 1, characterized in that: It also includes an auxiliary lifting component (20), wherein the auxiliary lifting component (20) is arranged on the top of the connecting seat (16).

5. The self-gravity spine protection chair with adjustable backrest height according to claim 4, characterized in that: The auxiliary lifting assembly (20) comprises a mounting seat (201), a gear 1 (202), a screw rod 2 (203), a lifting column (204), a gear 2 (205), and a rotating handle (206); the mounting seat (201) is fixedly mounted on the top surface of the connecting seat (16); the gear 1 (202) is rotatably mounted on the inner wall of the top of the mounting seat (201); the bottom end of the screw rod 2 (203) is fixedly connected to the inner ring of the gear 1 (202); the lifting column (204) is threadedly mounted on the surface of the screw rod 2 (203); the surface of the lifting column (204) is rotatably mounted on the inner wall of the top of the mounting seat (201); The back of the protective chair backrest (1) is fixedly connected, the gear 2 (205) is rotatably mounted inside the mounting seat (201) on the side opposite to the back of the protective chair backrest (1), the rotating handle (206) is fixedly mounted on the inner ring of the gear 2 (205), the outer edge of the gear 2 (205) is meshed with the outer edge of the gear 1 (202), the top of the lifting column (204) is movably mounted with a damping bracket (21), the top of the damping bracket (21) is fixedly connected with a headrest (22), and the surface of the headrest (22) is provided with a telescopic cervical vertebra fixing support (23).

6. The self-gravity spine protection chair with adjustable backrest height according to claim 1, characterized in that: It also comprises a support assembly (24), wherein the support assembly (24) is arranged at the bottom of the protective chair backrest (1).

7. The self-gravity spine protection chair with adjustable backrest height according to claim 6, characterized in that: The support assembly (24) comprises a wheeled chassis (241), a telescopic bracket (242), a connecting platform (243), a motor (244), a rotating column (245), a supporting plate (246), an electric push rod (247), and an abutting seat (248); the telescopic bracket (242) is fixedly mounted on the top of the wheeled chassis (241); the top of the telescopic bracket (242) is fixedly connected to the center of the bottom surface of the connecting platform (243); the motor (244) is fixedly mounted on one side of the top surface of the connecting platform (243); the rotating column (245) is rotatably mounted on the top surface of the connecting platform (243); one end of the rotating column (245) is fixedly connected to the driving shaft of the motor (244); The support plate (246) is fixedly connected to the surface of the rotating column (245), the surface of the support plate (246) is slidably connected to the inner wall of the protective chair backrest (1), the side of the support plate (246) is slidably connected to the surface of the connecting plate (8), the back of the support plate (246) is fixedly connected to the surface of the mounting frame (10), the electric push rod (247) is fixedly installed at the bottom of the connecting platform (243), the abutment seat (248) is movably installed at the top of the connecting platform (243), the bottom surface of the abutment seat (248) is fixedly connected to the top of the electric push rod (247), and the surface of the abutment seat (248) abuts against the bottom of the support plate (246).

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